Heating jacket for auto drain valves



1950 c. c. CAMDEN, JR., ETAL ,5 ,863

HEATING JACKET FOR AUTO DRAIN VALVES Filed 001;. 17, 1947 2 Sheets-Sheet 1 INVENTOR. M'Z/z'am 0. Camden,

ATTD R N EYS 2 Sheets-Sheet 2 INVENTOR. I VE'Z/zbm U. Cam 0 622,

J4, aka/50%.

C/zorZas' C. Camden,

ATTD RN EYS Aug. 15, 1950 Filed Oct. 17, 1947 Patented Aug. 15, 1950 HEATING J ACKET FOR AUTO DRAIN VALVES Charles C-.Camden; :J1-., and'William 0. Camden; Salem, Va.-

Application October 17, 1947; Serial No: 780,324-

4 Claimsa (Cl. 219-.--39) This invention relates to heating jackets and enclosures for valves and particularly drain valves where J condensation." and the like accumulate in the valve an'd are subject tofreezing;andin par ticular a 'jack'et having insulated Walls and electric heatingjunit-s' therein and means whereby it may be suspended around the drain valve of an air tank or thelike.

The-purpose of this invention isto provide a jacket adapted to be manufactured independently:

that may readily be installed around a drain valve which will maintain a relatively high temperature around the valve. H

Various methods "have been :employed for {applying. heat to valves, pipes" and -j oints, and th'e lik'e but' as these areusually wrapped around th'e device it is-:difficult to repair or replace a valve or part thereof, and furthermore as heating elements require special-handling it takes an expert to make a proper installation. With this thought in mind this invention contemplates a comparatively small unique jacket that may be placed on the market as an article of manufacture which is provided with electric heaing elements and that may readily be installed on a valve or the like.

The object of this invention is to provide an insulated electrically heated jacket that may readily be installed around a drain valve of a tank or the like and supported by stay bolts extending through the walls of the jacket and resting on the valve structure.

Another object of the invention is to provide a heating jacket for automatic drain valves that is not fitted to the valve so that it may be used on valves of difierent types.

A further object of the invention is to provide a heating jacket for drain valves and the like which is of a simple and economical construction.

With these and other objects and advantages in view the invention consists of the new and novel combination, construction, and arrangement of parts as hereinafter more fully described, set forth in the claims appended hereto, and disclosed in the accompanying drawings forming part hereof, wherein:

Figure l is a side elevational view showing the heating jacket installed on a drain valve under a tank.

Figure 2 is a similar view taken on line 2--2 of Figure 4 showing a vertical section through the jacket with parts in elevation.

Figure 3 is a View showing an end elevation of the jacket.

Figure 4 is a cross section through the jacket taken on line 4-4 of Figure 2.

Figure 5 is a vertical through the jacket taken on line 55 of Figurafiu Figure 6 is a sectional plan through the-jacket taken on 1ine" 5-6 of Figure5.

Referring-now to the drawings wherein likei reference characters indicate corresponding: parts the heatingv jacket'ofthis inventiomincludes a; U-shape body Illof relativelyI-thick asbestos "insulation; end cover sections ll and l 2 'alsoOf thick' asbestos insulation, stay' bolts l3: and: H; and

heatingunitsl5 andil 6'.

The outersurface of. the body Illis covered with a sheetofthin metalll having flanges-i0 and. l9-at the'ends and-threaded inserts and 2| areembeddedinthe insulation and secured to the inner surfacesof-theflangesto-receive screws- 22 and 23 that hold the endcovers to theends of the'body. The body is also provided with threaded studs I i l-and 25 providing posts or terminals 20 for-connections to the-heating units, the Stud 2 having an insulating washer 25 separating the nuts 2'! and 28 from the metal sheet l1, and the post 25 having a metal washer 29 which is held against the metal sheet to form a ground by a nut 30, as shown. A ground connection 3| is illustrated in Figure 4, and it will be understood that the connection to a ground may be formed in any manner. The stay bolts [3 and M are positioned in the side walls of the body It! and these are secured by nuts 32 and 33 as shown in Figure 6. The stay bolts are positioned to rest on the upper surface of the valve 34 as shown in Figure 4 and thereby provide means for clamping the jacket on the valve with the upper edges of the jacket against the lower surface of a tank 35.

The end cover sections II and I2 are also formed with thin sheet metal 36 and 31 on the outer surfaces thereof and the edges are provided with flanges 38 and 39 that overlap the sides of the body as shown in Figure 6. The ends are provided with openings 40 and 4| that are positioned over the connections to the valve as shown in Figure 2.

The heating units 15 and I6 may be of any suitable type and these are connected by a wire 42 with one unit connected to the ground by a wire 43 and the other to the terminal or stud 24 by a wire 44 roviding an electrical connection.

With the parts arranged in this manner the heating jacket may readily be installed on an automatic drain valve by placing the body section upward around the body of the valve and inserting the stay bolts which, as illustrated in Figures- 2 and 4, will hold the body upward in position around the valve. The ends may then be placed 1 longitudin'al section" over the ends of the valve and secured to the body by the screws as shown and described. The heating elements may then be connected to any suitable source of electric current with the terminal at one side forming a ground and the other providing an electrical connection.

It will be understood that any suitable insulating material may be used and the outer shell may also be made of plastic or the like.

It will also be understood that other changes may be made in the design and arrangement of the parts without departing from the spirit of the invention.

What is claimed is:

1. A heating jacket for drain valves and the like comprising a U-shapcd body section of comparatively thick insulating material having an outer shell, end sections providing closures at the ends of the body also with insulating material having outer shells, means securing the end sections to the body, and stay bolts through the body adapted to rest upon upper surfaces of the valve to support the jacket on the valve.

2. In a heating jacket for drain valves and the like, a U-shaped body of insulating material, stay bolts through the body positioned to engage upper surfaces of the valve to support the body with the upper edges thereof engaging the under surface of a tank on which the valve is mounted, ends of insulating material having flanges overlapping the ends of the body and having openings therein to receive ends of the valve, and means securing the ends to the body.

3. In a heating jacket for drain valves, the combination, which comprises, a U-shape casing having inwardly extending flanges at the ends with threaded inserts on the inner surfaces of the flanges, a continuous lining of insulating material covering the inner surface of the casing, end covers with flanges at the sides shaped to correspond with the cross section of the casing and with the flanges overlapping the sides of the casing, said end covers having centrally disposed. openings therethrough, linings of insulating material covering the inner surfaces of the end covers, screws in the end covers positioned to correspond with the threaded inserts in the ends of the casing for securing the end covers to the casing, stay bolts extending through the casing positioned to engage the upper surface of a valve on which the jacket may be installed to support the jacket around the valve, and heating elements in the casing with one terminal thereof grounded through the casing and the other providing an electrical connection.

4. In a heating jacket for drain valves of tanks and the like, a U-shape insulated casing having an outer wall, stay bolts extending through the casing and wall positioned to support the casing on a valve or the like, insulated end covers with outer walls and having openings therethrough,

said walls of the end covers having flanges over-- lapping the wall of the casing, and means providing heat on the inside of the casing.

CHARLES C. CAMDEN, JR. WILLIAM O. CAMDEN.

REFERENCES CITED in the 

